Train-annunciator.



L. W. GIVAN. TRAIN ANNUNGIATOR. APPLIOATION FILED MAY 13, 1011.

Patented June 17, 1913.

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COLUMBIA FLANOGRAH C0.,WASHXNGTON, n. c.

UNITED STATES PATENT OFFICE.

LESLIE W. GIVAN, OF SPRING LICK, KENTUCKY.

TRAIN-ANNUNCIATOR.

Application filed May 13, 1911.

To all whom 1'15 may cancer/1,.

lie it known that l, Lnsnm \V. (iIVAN, a citizen of the United States, residing at Spring Lick, in the county of (irayson and State of Kentucky, have invented a new and useful Train-Annunciator, of which the following is a specititaition.

This invention relates to an improved construction of train ttlllllllltfltttUl'S whereby certain advantages hereinafter set forth are obtained.

This invention has for an object to provide means whereby a train-despatcher may ascertain if a train has passed a station where there is no agent on duty.

Many railways use the telephone for despatching trains, and have in service a selective means for calling a desired station without disturbing any other station. The telephones are usually connected in multiple on one circuit, and the selective calling means in series on another circuit. The calling means consisting of an instrument installed in each station, and operated by electric currents of varying intensity or polarity, whereby the dcspatcher may close a local circuit and ring a call bell. The despatcher wishing to obtain information as to the progress of a train, calls a station, at which he knows the train is due and, upon the agent answering. is informed verbally if the train has passed or not. But there are many stations where no agents are on duty at night, the despatcher can then only obtain the information from all night stations, that is where agents are on duty at night, these are far apart and the despatcher can not keep in satisfactory touch with the progress of the trains. My device is intended to enable the despatcher to ascertain at any time if a train has passed a station since the last time he called.

The object of this invention is to provide a device that may be switched in in place of the call bell, by the agent when he leaves the station, and that may be operated by the despatcher to ascertain if a train has passed that station.

further object is to provide means of the nature set forth that shall be reliable in operation, economical in construction, that may be readily installed and easily main tained.

ll'ith the foregoing, and other objects in view, the invention consists of the novel construction, and arrangement of parts to Patented June 1'7, 191 3.

Serial No. 626.959.

Specification of Letters Patent.

be hereinafter referred to and illustrated in the accompanying drawing, which forms a part of this specification, in which is shown an embodiment of the invention, but it is to be understood that changes, Variations and modifications may be resorted which come within the scope of the claims appended hereunto.

ln the drawings, in which similar reference numerals designate like parts in the ditl erent views;l igure 1, is a front ele- Yation of an embodiment of my invention and Fig. 2, a diagrammatic plan showing the circuit connections at a local, or way station.

A circuit controlling device, 3%), is installed in each station. These devices are connected (usually in series) to a line, it), that extends, from the train despatchers ollice, to each station, on the section of road under the train despatchers charge, and are responsive to currents of varying strength, frequency, or polarity sent out over the line by the despatcher; and provides means whereby the despatcher may by the manipulation of a transmission device 82, (that may be of any suitable construction) close a local circuit in any desired station. without disturbing any other station. A callbell, lit-1, located in each station, and is adapted to be connected in a local circuit control ed by the circuit closing device 39. A. telephone, 41, installed in each station and connected with line wires, li --43, extending from the train despatchers ollice, provides means. in connection with a similar instrument. 3), in the despatehefs office, for oral conununiealion.

lily device is intended to be connected in the local circuit, controlled by the circuit; controlling device 39', in lieu of the call-bell.

Referring to the drawings, 1 designates the back, that may be of any suitable ma terial. on which the apparatus is mounted. A shelf, or ledge. 2 is secured on the back near the lower edge thereof, on the shelf 2 are mounted magnets 3, 4t, and above the magnet 3 an armature lever (3 suitably fnlcrumed, at 7 in a bracket 8. An arm t erected on the lever (3, near the fulcrum thereof, and n'ovided with an insulated portion 10, is adapted to bear against the contact springs it and 13 pressing them, respectively, against the springs 12 and ll; 11 and being in the release circuit and l3 and 1t in the transmission circuit. ()11 the end of the lever (3 is a linger 11 provided with a tip of insulating material to, adapt ed to be brought to bear against and ("lose the contact springs 11 18, in the signal circuit. Above the magnet .3 an armaturelever it) is suitably t'ulcrumcd, at 20, in a. bl'tltflttt 21. ()n the lever it). near the tub crum thercot an arm :22? is erected, and pro vided with an insulatml portion :3. adapted to bear against and close the contact springs 14 t in the main circuit. ()n the end of the lever it) is a finger 26, provided with a notch 27. A pawl :23, pivoted at it), is adapted to engage in the notch 2i and maintain the lever It) in the position to which it is moved by the magnet Above the magnet i an armature it) is 't'ulcrumcd in a. bracket 31, and is provided with a iingcr 53:2 adapted to engage the pawl :25 and dis engage it from the notch :87 when the armature 30 is attracted by the magnet. .t spring 33 serving to hold the armature 3t) normally away from the magnet and the finger 32 out. of engagement with the pawl Stops 3 are provided to limit the travel of the levers t3 and it). The contact springs may be constructed and mounted in any desired manner. but I have illustrated them as formed of sheet metal and mounted in blocks 35 of insulating material such as fiber, or hard rubber, the blocks 35 being secured to the bacl; l, in any SHltz'llJlt manner, as by screws.

An audible annunciating device 36, that may be any suitable electrical sound producing device, but that I have illustated as a buzzer, is located near the top ot the board 1. in proximity to the annunciating device 36 is lo rated a tansmission device 37, adapted to take up and transmit the sound from the annunciating device.

37 is the transmission portion of phone, '1'. (a, the ordinary form of carbon transmitter and an induction coil, and is too well known to need extended description. The secondary winding of the induction coil is connected by the wires Ti) -80 to the leads ot the lo all telephone ll, that is connected to the line wires l2 it the primary winding of the induction coil being included in the transmission circuit described elsewher Referring to the diagram Fig. 2, 3S designates a call bell, 39 a selector, connected in series on the line it), by means of which the t-ain despatcher may close a local circuit and ring the belt 18. A. telephone it is connected to the line wires t? and it). A switch ll of suitable construction. is provided that serve to connect the belt or the main circuit to to the selector J39. 'lhcre are five circuits;--. main, or operating circuit; a control. or track circuit; an annunciator, or buzzer circuit: a transmission circutt, and a release circuit. The main circuit a teletion,

is, from the battery .30, by wire 51 to binding post; 52, circuit wire 53 to magnet 5, wire 54' to contact springs 2' )*2llwire 55 to magnet 23, to binding post no, to switch 44, to selector it), to battery .30. This circuit is normally open at. two points, the contact. springs BS- 24 and in the selector, it may be closed in the selector by the despatcher. :nd at the springs 2.} L l by the wheels of a passing twin closing the track circuit. as they pass over the insulated -ail sections SU -(3t). The tr; ck circuit is from a battery 57, wire to an insulated section of rail 59, of an insulated section of track, from the other ra l tit) to binding post til, to magnet 5, to binding post ($2, to battery 57. The annunciator circuit, is from a battery ttil, to binding post (it, wire (35 to buzzer lit vire (it) to contact springs iT -ltw'. wire UT to binding post (38, to battery ()3. The transmission circuit, is from a battery (35) to binding post. TO, wire 7]. to contact springs ll--13 to the transmitter 37, through the primary winding ot' the induction coil, in the transmission device by wire T2 to binding post 11; thence to battery U9. The release circuit is from the battcry it to binding post 75 thence to magnet 4, wire 76 to contact springs lQ- l3 wire 77 to binding post 78 thence to battery T l.

The operation is as follows: \Vhen the agent leaves the station he throws the switch 34, thereby connecting the main circuit with the selector. It a train passes a station, say A, it will, by means of the wheels 81 thereof passing over the insulated sections of rail .BfLAitL close the track circuit, this nill energize magnet i attracting lever 1t),

thus bring ng the arm M against the spring 24 closing the main circuit at the springs 2t i3. \hen the lever 19 is drawn down the. pawl 28 will engage with the notch 97, holding the lever in the position to which it is drawn. thus keeping the main circuit closed at the springs Zt- QB, after the train has passed. It now the dcspatchcr "comes in closing the main circuit at the selector. magnets ii and i will be energized. magnet 3 will draw down the armature t3 causing the following actions to ensue simultane- ()ll l .1 1st. The finger t) presses the spring 11 against 12 closing the release circuit. thus energizing the magnet t. this attracts the arnniturc it) bringing the finger 32 into engagement with the pawl withdrawing it l'rom the notch 27 thus releasing the lever 1'! which would non tall. opening the main circuit at the springs Ji -23. but that the magnet 53 bring now energized by the main circuit, the lever it) is maintained in position. thereby holding the main circuit closed at the sin-logs 724 B? as long as it is closed at the selector. 2nd. l inger I53. on the end of lever it. presses spring l7 thereby holding the main circuit and sounding the audible signal. 3rd. Finger 9, on the lever 6, presses the spring 13 against H closing the transmission circuit, whereupon the signal produced by 36 is transmitted over the circuit wires 79-80 to the main line wires 4248 thence to the despatcher, who hearing the signal knows that a train has passed that station. Having ascertained that fact the despatcher drops the station, the main circuit being opened at the selector the different parts resume their normal position. The despatcher now calls, say B it the train has not reached B he will get no response, as the main circuit will be open at the springs 24 By calling successive stations the despatcher may readily locate a train, and keep in touch with its progress.

Having thus described my invention so that any one skilled in the art pertaining thereto may make and use the same I claim,

l. In a train annunciator, a main circuit normally open at two points, means controlled by the train despatcher for closing it at. one point, means adapted to be op erat-cd by a passing train for closing it at the other point, and means for holding it closed, at said last named point, after the passage of the train.

2. In a train annunciator, a signal circuit including an audible signal, a circuit including a transmitter, a main circuit normally open at two points and including means for closing the aforesaid circuits, means whereby said main circuit is closed at one point by a passing train and selective means under the control of the train despatcher for closing said main circuit at the other point.

3. In a train annunciator, a main circuit normally open at two points, a second circuit adapted to be closed by a passing train, means included in Said second circuit for closing the main circuit, at one of said points, means for retaining the main circuit closed after the passage of the train, and means controlled by the main circuit for releasing said retaining means.

in a train annunciator, a main circuit normally open at two points, a second circuit adapted to be closed by a passing train, means included in said second circuit for closing the main circuit at one of said points,

. means for retaining the main circuit closed at said point after the passing of the train, a signal circuit including an audible signal, a transmission -ircnit including a transmitter, a release circuit including m ans for releasing the aforesaid retaining means, means controlled by the main circuit for closing said release circuit, and means included in the main circuit for closing said signal and transmission circuits.

in a train annunciator, a main circuit normally open at two points, means controlled by the train despatcher for closing it at one point, means adapted to be operated by a passing train for closing it at the other point, and means for holding it closed, at said last named point, after the passage of the train, a circuit including an audible signal, and means included in the main circuit for closing said signal circuit.

(3. In a. train annunciator, a 11min circuit normally open at two points means controlled by the train despatcher for closing it at one point, means adapted to be operated by a passing train for closing it at the other point, and means for holding it closed at said last named point, after the passage oi the train, a circuit. including an audible signal, a circuit including a transmitter, and means included in the main circuit for closing said circuits.

T. In a train annunciator, a main circuit normally open at two points, means controlled by the train despatcher for closing it at one point, a second circuit adapted to be closed by a passing train, electromagnetic means included in said se:ond clrcuit for closing the main circuit, said electromagnetic means also included in the main circuit, means for holding the main circuit closed at the second named point after the passage of a train, a circuit including an audible signal, a circuit including a transmitter, means included in the main circuit for closing said signal and transmission circuits, and means controlled by the main circuit for releasing said holding means.

8. A line circuit including selective circuit closing means, a telephone circuit, a main circuit normally open at two points and adapted to be closed at one point by said selective means, means whereby said main circuit is closed at the other point by a passing train, a normally open circuit including a signal, a transmission device having primary and secondary windings, a normally open circuit including the primary winding of the transi'nission device, a secondary winding of said device being connected to the telephone circuit, and means included in the main circuit for closing said signal and primary circuits.

9. A signal circuit including an audible signal, means for transmitting said signal to the train despatcher, means under the control of the tnin despatcher for sounding said signal, said means adapted to be ren dered operative by the passage of atrain.

10. A line circuit including selective circuit closing means, a telephone circuit, a main circuit normally open at two points and adapted to be closed at one point by said selective means, another circuit including means for closing the main circuit at the other point and adapted to be closed by a passing train, means for holding the main circuit closed, at the second named I leasing said holding means, means including 0 point, after the passage of the train a norin the main circuit for closing said signal mally open circuit, including a signal a and primary circuits, and means controlled transmission device having primary and seci by the main circuit for closing said release ondary windings, a normally open circuit circuit.

including the primary winding of the trans- LESLIE \V. GIVAN. mission device, the secondary Winding being \Vitnesses:

connected to said telephone circuit, it nor- \ViLL P. FORBTS,

mally open circuit including means for rej \V. B. MUNNELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

